/*
 * Created on 02-Jan-2005
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.utils.xml.rss;

import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.utils.Utilities;
import org.gudy.azureus2.plugins.utils.resourcedownloader.ResourceDownloader;
import org.gudy.azureus2.plugins.utils.resourcedownloader.ResourceDownloaderException;
import org.gudy.azureus2.plugins.utils.xml.rss.RSSChannel;
import org.gudy.azureus2.plugins.utils.xml.rss.RSSFeed;
import org.gudy.azureus2.plugins.utils.xml.simpleparser.SimpleXMLParserDocument;
import org.gudy.azureus2.plugins.utils.xml.simpleparser.SimpleXMLParserDocumentException;
import org.gudy.azureus2.plugins.utils.xml.simpleparser.SimpleXMLParserDocumentNode;

/**
 * @author parg
 * 
 */

public class RSSFeedImpl implements RSSFeed {
    private boolean is_atom;

    private RSSChannel[] channels;

    public RSSFeedImpl(Utilities utilities, URL source_url, ResourceDownloader downloader)

    throws ResourceDownloaderException, SimpleXMLParserDocumentException {
        this(utilities, source_url, downloader.download());
    }

    public RSSFeedImpl(Utilities utilities, URL source_url, InputStream is)

    throws SimpleXMLParserDocumentException {
        try {
            SimpleXMLParserDocument doc = utilities.getSimpleXMLParserDocumentFactory().create(source_url, is);

            String doc_name = doc.getName();

            is_atom = doc_name != null && doc_name.equalsIgnoreCase("feed");

            List chans = new ArrayList();

            if (is_atom) {

                chans.add(new RSSChannelImpl(doc, true));

            } else {

                SimpleXMLParserDocumentNode[] xml_channels = doc.getChildren();

                for (int i = 0; i < xml_channels.length; i++) {

                    SimpleXMLParserDocumentNode xml_channel = xml_channels[i];

                    String name = xml_channel.getName().toLowerCase();

                    if (name.equals("channel")) {

                        chans.add(new RSSChannelImpl(xml_channel, false));
                    }
                }
            }

            channels = new RSSChannel[chans.size()];

            chans.toArray(channels);

        } finally {

            try {
                is.close();

            } catch (Throwable e) {

                Debug.printStackTrace(e);
            }
        }
    }

    public boolean isAtomFeed() {
        return (is_atom);
    }

    public RSSChannel[] getChannels() {
        return (channels);
    }
}
